Trolley.



PATENTED M 31 TROLLEY'.

APPLIOATION FILED JULY 2a, 1903.

2 SHEETS-SHEET PATENTED MAY 31, 1904. J. H. WALKER.

TROLLEI,

APPLICATION FILED JULY 29, 1903.

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no MODEL.

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WITNESSES.

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Patented May 31, 1904.

. UNITED STATES PATENT ()rrics- JOHN II. WALKER, OF LEXINGTON, KENTUCKY.

, TROLLEY.

SPECIFICATION forming part of Letters Patent No. 761,566, dated May31, 1904.

' l 7 Application filed July 29,1903. Serial No. 167,466. (No 1116661.)

Improvements in Trolleys,of which the following is a specification.

Th1s lnvention is an improvement 1n trolley mechanism seeking to provide a novel con-.

struction whereby to secure a practically con:

tinuous copper conductor from the trolley: wheel to the motor and toprovide, improve-- ments in the connections between the harp,

the branches of the, conductor-wire, and the trolley-wheel, as will be more fully described;

. and the invention consists in'certain novel constructions and combinations of parts, as.

will be hereinafter described and claimed. In the drawings, Figure 1 isa side elevation, andFig. 2a top plan View, of the upper end of a trolley embodying my invention. Fig. 3 is a detail cross-section on about line 3 3 of Fig. 1, Fig. i is an elevation of the outer end of one of the carrier-blocks. Fig. 5 is an elevation of the outer end of the other carrier-block. Fig. 6 is an elevationfof'the inner end of one ofthe carrier-blocks. Fig. 7 is a perspective view of the shaft, the bushing-tube thereon, and the nuts and end washers for the shaft.- Fig. 8 is a cross-section on about line 8 8 of Fig. 7 Fig.9 is a sectional view of the shaft and its bushing, showing a somewhat different construction of bushing from that shown in Fig. 7 Fig. 10 isa detail perspective view of the upper end of one of the harp-prongs. -Fig-11 isa detail perspective view of one of the; carrier-blocks.

. By my invention I provide, in connection with the harp-prong and the trolley-wheel, the conductor-wire branches, having at their upper ends flat circular headswhich'fit against the inner faces of the harp-prongs and areso securedin such relation and in firm contact with the carrier-blocks for the wheel-supports as to secure the desired electrical connections.

In carrying out my invention I construct the harp with the prongs A, which are provided in their upper ends with the circular openings B, which are threaded at b to re gives the prong the-desired ceive the threaded stems on the carrier-blocks,

I presently described. These prongs A arev made n angle form 1n crosssect1on,as shown atA in Fig. 10, thus producing an L-shaped cross-sectional prong, which operates to resist any undue lateral springing of the prongand rigidity in the use of the invention. The conductor-wire D leads to the socketed connection d, whichis provided with the lug 0K, from which extend the branches D of the conductor-wire. These branches D are pro- ,vided at their upper ends with the flat heads D in the form of continuous open rings, which are concentric with the openings B in the prongs A and are lapped against-the inner sides of said prongs, as shown in Figs. 2, 3,

and 10, and are secured in such relation by the carrier-blocks, presently described. These flat heads D form conductor-bearings, against which the carrier-blocks bear at their outer faces, thus providing broad flat conductingsurfaces between the carrier-blocks and the circular heads D of the branches of the conductor-wire, which conducting-surfaces extend throughout the outer facesof the carrier blocks, as will be understood from Figs. 2, 3, 10, and 11 of the drawings.

The carrier-blocks C and G are alike. These carrier-blocks are provided at their outer ends with outwardly-projecting stems C socketed to receive thenuts on the wheel-shaft and threaded externally toward their outer ends at C to engage with the threads I) in the harpprongs, so that when the heads are threaded to the position shown in Fig. 3 they will clamp the flat heads D of the conductor wire branches tightly against the inner faces of the harp-prongs in order to secure perfect connection between the carrier-blocks and the hat, heads D in the use of the invention, as

in the form of circular grooves F, which are eccentric to the shaft G, so that as the wheel revolves concentrically with the shaft G any tendency to form grooves in the ends of the trolley-wheel, presently described, by reason of the grooves in the carrier-blocks will be avoided, as the end surfaces of the Wheel moving over the eccentric grooves in the thrustplates will tend to grind smooth at all times. Therefore it is preferred to make the graphite recesses F eccentric, as shown in Fig. 6; but manifestly the form of said recesses may be varied, if desired.

The carrier-blocks are provided with openings for the shaft G and have in their inner ends ci'rcular recesses C to receive washers E, of leather, rawhide, or the like, which fit on the shaft G and Within the said recesses Cf, as shown in Fig. 3.

The shaft G is threaded at its ends g to receive the end nuts H andH and is provided with a projection Gr, fitting in a keyway in the steel bushing I, upon which the wheel J turns. In Fig. 9 the bushing is integral from end to end, while in Fig. 7 and in Fig. 3 I provide at the ends of the steel bushing I copper rings I to aid in conducting the current from the wheel J to the copper shaft G, so that the current is carried off directly from the wheel to the carrier-blocks, as well as through the end rings I in connection with the bushing I. It will be noticed that the steel bushing I will receive the wear of the wheel, while the rings 1 will aid in carrying off the current.

The wheel J has an oil-cavity J and avalve J by which it may be supplied with oil. The wheel is also provided with a hub-tube K, which may be suitably secured in the wheel and is provided in its bore with grooves K, supplied with graphite and operating upon the bushing I, which latter is keyed on the shaft G by the means before described. The shaft G extends through the opening 0 in the carrier-blocks and receives the nuts H and H on its ends, said nuts operating in the sockets in the outer ends of the carrier-blocks and bearing against the split washers E, fitting in the bases of said sockets, as shown in Fig. 3.

It will be understood in operation the earrier-blocks are screwed into the openings in the harp-prongs from the inner sides of the latter, being suitably adapted at their outer ends to receive a wrench, by which they may be turned as may be desired. I

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The improvement in trolleys herein described comprising the harp-prongs provided with the openings threaded for engagement by the screw-stems of the carrier-blocks, the conductor branches having circular heads concentric with the openings in the harp-prongs and fitting against the inner faces of said prongs, the carrier-blocks provided at their outer sides with the projecting threaded stems passing through the openings in the conductor branches and screwing into the openings in the harp-prongs, the trolley-wheel and its supporting devices carried by the carrierblocks substantially as set forth.

2. The combination in a trolley with the wheel and its supporting devices of the carrier-blocks having means for supporting said devices and provided on their outer sides with projecting threaded stems, the harp-prongs having openings for said stems of the carrierblocks, and the conductor branches held between the carrier-blocks and the harp-prongs substantially as set forth.

3. The combination of theharp-prongs having openings, the carrier-blocks provided on their outer sides with projecting stems fitting in said openings of the harp-prongs, the conduetor branches held between the carrierblocks and theharp-prongs, the trolley-wheel, the shaft supported in the carrier-blocks, the bushing on said shaft and forming a bearing for the trolley-wheel, and the conductor-rings at the opposite ends of said bearing-bushing substantially as set forth.

4. In a trolley, the combination with the harp-prongs, of the conductor branches having at their outer ends heads extending adjacent to the inner faces of the harp-prongs, the wheel, and the carrier-blocks supporting a Wheel and arranged between the wheel and the heads of the conductor branches.

5. The combination of the harp-prongs having openings, the carrier-blocks fitting into said openings from the inner sides of the prongs, the conductor branches held between the carrier-blocks and the inner sides of the prongs, the trolley-wheel, and its supporting devices carried by the carrier-blocks substan tially as set forth.

6. The combination of the wheel, the harpprongs having openings for the carrier-blocks, the carrier-blocks having stems held in said openings and provided in their outer ends with recesses for the nuts of the wheel-supporting shaft, the wheel-supporting shaft having the nuts held in the outer recesses of the carrier-blocks, the wheel, and the conductor branches held between the carrier-blocks and the harp-prongs substantially as set forth.

7. A trolley having its harp-prongs provided with circular openings and conductor branches having circular heads concentric with said openings combined with the wheel and the carrier-blocks held in the circular openings of the conductor branches and of the harp-prongs, substantially as set forth.

8. The combination of the harp-prongs having openings, the conductor branches having at their outer ends heads extending adjacent to the openings in the harp-prongs, the trolley-wheel, and the supporting devices for the wheel held in the heads of the branches and tween said prongs and the wheel-supporting in the openings of the harp-prongs. devices.

9. The combination of the trolley-Wheel its supporting devices, the harp-prongs having 7 JOHN W 5 openings receiving said devices, and conduc- Witnesses:

tor branches having heads extending adjacent SOLON C. KEMON,

to the openings in the harp-prongs and be- PERRY B. TURPIN. 

